Code
OBGC
Status
Informal (Van Adrichem Boogaert & Kouwe 1994).
Lithologische beschrijving
Consisting of dark shaly mudstones and some intercalated, thin, white to greenish-grey, fine-grained sandstones. The unit is in places slightly calcareous or dolomitic.
Afzettingsmilieu
Low-energy shelf, shoreface to transitional-marine setting.
Definitie ondergrens
Not yet determined.
Definitie bovengrens
Placed at the base of the first distinctive sandstone/limestone beds. In absence of the Bosscheveld formation, the Bollen claystone formation is directly overlain by the massive carbonates of the Zeeland Formation. Where the succession is complete, the Bollen claystone formation is overlain by the heterolithic deposits of the Bosscheveld formation.
Dikte indicatie
Up to 306 m in KTG-01.
Geografische verbreiding
Regionale correlatie
UK: ?; GER: ?; BEL: ?.
Ouderdom
Late Devonian.
Holostratotype
Well:
Depth (thickness) AH:
2005 - 2230 m (225 m)
Parastratotype
Well:
Depth (thickness) AH:
2836 - 2878 m (42 m)
Oorsprong naam
Named after the Bollen van Goeree, a shoal in the southern North Sea off the island of Goeree-Overflakkee.
Vorige benaming(en)
None.
Gereviewed door (datum)
Tom van Hoof (2017).
Referenties
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section B, Devonian and Dinantian. Mededelingen Rijks Geologische Dienst, 50, 1-20.
Cite as
TNO-GDN ([YEAR]). Bollen Claystone formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/bollen-claystone-formation.